ipmi: ipmb: validate write message length

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-81007
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:09 UTC
Updated2026-10-19 09:17:34 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: validate write message length ipmb_write() read message fields before validating the length byte. A zero or short write can read uninitialized stack bytes. A length smaller than the SMBus header underflows the block write length. Require a non-empty buffer and the minimum IPMB request length. Also require the length byte plus payload before parsing the message.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.001250000 probability, percentile 0.025170000 (date 2026-09-14)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 51bd6f291583684f495ea498984dfc22049d7fd2 8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89 git Not specified
CNA Linux Linux affected 51bd6f291583684f495ea498984dfc22049d7fd2 94f8d20153e348c79bc14dc25f873470518892da git Not specified
CNA Linux Linux affected 51bd6f291583684f495ea498984dfc22049d7fd2 e527cd4e80066e1ed070fdc7c705bde340cdcc62 git Not specified
CNA Linux Linux affected 51bd6f291583684f495ea498984dfc22049d7fd2 7d66d54b974cff0a959e188af844d2d110422767 git Not specified
CNA Linux Linux affected 51bd6f291583684f495ea498984dfc22049d7fd2 60939bcda6f3f104ef456fdbf3cc5733c0720fb1 git Not specified
CNA Linux Linux affected 51bd6f291583684f495ea498984dfc22049d7fd2 5719431ca2b5fa26560bb38f6202f8b97fa3bbb0 git Not specified
CNA Linux Linux affected 51bd6f291583684f495ea498984dfc22049d7fd2 a84c6e3d188f2c6e674910929eb790634299d6d5 git Not specified
CNA Linux Linux affected 51bd6f291583684f495ea498984dfc22049d7fd2 53637506884dbd5c91a89b1a3547d99d80f8ed2c git Not specified
CNA Linux Linux affected 5.3 Not specified
CNA Linux Linux unaffected 5.3 semver Not specified
CNA Linux Linux unaffected 5.10.270 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.221 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.188 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.157 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/60939bcda6f3f104ef456fdbf3cc5733c0720fb1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e527cd4e80066e1ed070fdc7c705bde340cdcc62 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/53637506884dbd5c91a89b1a3547d99d80f8ed2c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a84c6e3d188f2c6e674910929eb790634299d6d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7d66d54b974cff0a959e188af844d2d110422767 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/94f8d20153e348c79bc14dc25f873470518892da 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8990c7f6bfc1e7689b7012a7d4d0efb9f07a9c89 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5719431ca2b5fa26560bb38f6202f8b97fa3bbb0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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